Asking for Shipping Method on Cart page?It might be appropriate to show an estimated shipping price - maybe for the country you think they are from - but as @user12999 points out, this may vary. If, in your situation, hte shipping cost is fixed for an item, then show it as soon as possible. Just be aware that this is an either/or, and not easily switchable if they decide to have variant shipping.

How should I Redirect/Handoff users to a 3rd party site?As a rule, keeping the 3rd party site branded the same is good, even if they then have their own ( smaller ) branding. It gives customers a sense of security. Alternately, giving users a list of options, so they choose to go to another site.

Why do Juice cartons fail on opening?@BennySkogberg some do, but they often want better quality juice to, and so pay the extra 10% for better juice AND better opening. On the budget end, this is not cost-justifiable.